If file doesn't open go to System Preferences> Security & Privacy > Allow KinTek Explorer to be downloaded

Drag KinTek Explorer outside the downloads folder onto the Desktop

Drag back KinTek Explorer into the downloads folder

After following the steps should resolve the installation issue. The reason why the issue occurred on MacOS Sierra is due to Apple's advancing security protocols. KinTek Explorer is downloaded from the internet and not from the App Store. At this point, we are not a registered Developer with Apple. We are in the works of becoming a registered developer with Apple. We apologize for the inconvenience any questions visit our support page on kintekcorp.com.